package com.netty.codec;


import io.netty.buffer.ByteBuf;
import io.netty.buffer.Unpooled;
import io.netty.channel.ChannelHandlerContext;
import io.netty.channel.ChannelInboundHandlerAdapter;
import io.netty.util.CharsetUtil;

public class NettyProtoClientHandler extends ChannelInboundHandlerAdapter {
    //当通道就绪就会触发该方法
    @Override
    public void channelActive(ChannelHandlerContext ctx) throws Exception {
        //发送一个Student 对象到服务器
        StudentPOJO.Student student = StudentPOJO.Student.newBuilder().setId(7).setName("李四, 學生").build();
        ctx.writeAndFlush(student);
    }
    //当通道有读取事件时，会触发

    @Override
    public void channelRead(ChannelHandlerContext ctx, Object msg) throws Exception {
        ByteBuf buf = (ByteBuf) msg;
        System.out.println("服务端回复过来的消息:"+buf.toString(CharsetUtil.UTF_8));
        System.out.println("服务器的地址是: " + ctx.channel().remoteAddress());
    }
    //异常处理
    //关闭通道
    @Override
    public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) throws Exception {
        cause.printStackTrace();
        ctx.channel().close();
    }
}
